2 * SSA/ASS common functions
3 * Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "libavutil/avstring.h"
25 #include "libavutil/common.h"
27 int ff_ass_subtitle_header(AVCodecContext *avctx,
28 const char *font, int font_size,
29 int color, int back_color,
30 int bold, int italic, int underline,
33 avctx->subtitle_header = av_asprintf(
35 "ScriptType: v4.00+\r\n"
38 "Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, AlphaLevel, Encoding\r\n"
39 "Style: Default,%s,%d,&H%x,&H%x,&H%x,&H%x,%d,%d,%d,1,1,0,%d,10,10,10,0,0\r\n"
42 "Format: Layer, Start, End, Style, Text\r\n",
43 font, font_size, color, color, back_color, back_color,
44 -bold, -italic, -underline, alignment);
46 if (!avctx->subtitle_header)
47 return AVERROR(ENOMEM);
48 avctx->subtitle_header_size = strlen(avctx->subtitle_header);
52 int ff_ass_subtitle_header_default(AVCodecContext *avctx)
54 return ff_ass_subtitle_header(avctx, ASS_DEFAULT_FONT,
55 ASS_DEFAULT_FONT_SIZE,
57 ASS_DEFAULT_BACK_COLOR,
60 ASS_DEFAULT_UNDERLINE,
61 ASS_DEFAULT_ALIGNMENT);
64 static int ts_to_string(char *str, int strlen, int ts)
67 h = ts/360000; ts -= 360000*h;
68 m = ts/ 6000; ts -= 6000*m;
69 s = ts/ 100; ts -= 100*s;
70 return snprintf(str, strlen, "%d:%02d:%02d.%02d", h, m, s, ts);
73 int ff_ass_add_rect(AVSubtitle *sub, const char *dialog,
74 int ts_start, int duration, int raw)
77 char s_start[16], s_end[16], header[48] = {0};
78 AVSubtitleRect **rects;
81 ts_to_string(s_start, sizeof(s_start), ts_start);
83 snprintf(s_end, sizeof(s_end), "9:59:59.99");
85 ts_to_string(s_end, sizeof(s_end), ts_start + duration);
86 len = snprintf(header, sizeof(header), "Dialogue: 0,%s,%s,Default,",
90 dlen = strcspn(dialog, "\n");
91 dlen += dialog[dlen] == '\n';
93 rects = av_realloc(sub->rects, (sub->num_rects+1) * sizeof(*sub->rects));
95 return AVERROR(ENOMEM);
97 sub->end_display_time = FFMAX(sub->end_display_time, 10 * duration);
98 rects[sub->num_rects] = av_mallocz(sizeof(*rects[0]));
99 rects[sub->num_rects]->type = SUBTITLE_ASS;
100 rects[sub->num_rects]->ass = av_malloc(len + dlen + 1);
101 strcpy (rects[sub->num_rects]->ass , header);
102 av_strlcpy(rects[sub->num_rects]->ass + len, dialog, dlen + 1);